Carbureter.



J. W. PARKIN.

CARBURETER.

APPLICATION FILED APR. 9, 1913. 1, 1 20,845. Patented Dec. 15, 1914.

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1,120,845 Patented Dec. 15, 1914.

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gained; all as will be hereinafter in .showing the air cont JOSEPHWALTER 'PABKIN, 0F PHILADELPHIA, PENNSYLVANIA.

CABBU'BETER.

Specification tr Potters Patent.

Patented Dec. 15,1914.

Application filed April 9, 1913. Serial No. 759,838.

To all whom it may concern:

Be it known that I, Josnrn' W. PARKIN, a citizen of the United States,residing at Philadelphia, in the county of Philadelphla and State ofPennsylvania, have invented certain new and. useful Improvements inCarbureters, of which the following is a specification.

My invention relates to carbureters for gas engines.

The Object oi the invention is to provide a carbureter of novel, simpleand eificient construction wherein the valve for controlling the oilinlet andthe valve forcontrolling the air inlet to the engine arerelated and operated, so that the, proper mixture of vaporized oil andair may be supplied to the engine at different speeds thereof.

A further object. ofthe invention is to construct the parts so that theymay be adjusted to vary thetimin of the operation of the oil. inletvalve w1th respect to the operation of the valve for controlling the airinlet to the engine A further object of the invention is to provide acarbureter which will reduce the partial vacuum heretofore required inthe engine to draw in the explosive charge, and

A further object of the invention is to construct and arrange the partsfor controlling the passage of air through the carbureter and the supplyof oil thereto, so that the explosive mixture may be nicely varied inaccordance with the varied speeds of the engine, to increase theefiiciency of the engine, and provide for the proper supply of fuelthereto under all conditions; and a further object of my invention is toprovide certain novel details of construction and arrangements of partswhereby advantafies are y d scribed and claimed.

In the accompanying drawings, illustrating my invention "Figure 1 is avertical section, through my im roved carbureter,

iling valve in the open position. Fig. 2, is a vertical section of partsof the carbureter, showing the air controlling valve in the closedposition. Fig. 3, is a vertical section of the device, on line 3-3 ofFig.2. Fig. 4, is a side elevation of a portion of the carburetor. Fi 5,is a horizontal section, on 'line' 5-5 of ig. 4. Fig. 6, is an enlargedvertical section through the oil supply pipe and the controlling valvetherefor.

Referring to the drawings, 2 designates a casing which incloses acarbureting chamher for the air and vaporized oil and having an inletopening 4 and an outlet openin 6. The top of the casing 2 is providedwit a flange 7 by means of which the casing 2 may be secured to anengine with the carbureter outlet opening 6 in communication with theinlet passageway or passageway of the engine, through which theexplosive mixture is drawn. I

Adjacent the casing 2 is a casing 8 inclosing an oil chamber 9 andhaving a part 10 projecting beneath the casing 2 and beneath a head 11on the inner end of an air inlet pipe 12 having its outer end open andits inner end communicating with the. inlet opening 4 of the carburetingchamber, as shown. The head 11 on the air inlet pipe is located betweenand engaged by the bottom of the casing 2" and the top of the projection10, and the head 11 is clamped therebetween by a pair of bolts 13 fixedto and extending downwardly from the casing 2 and through openings inthe projection 10- and having nuts 14 on their lower ends screwed intoen- 'gagement with the bottom of the projection 10. The bottom of thecasing 2 is provided with a downwardly extending. annular flange 15fitted to a circular opening in the top of the head 11, and theprojection 10 is 7 provided with an upwardly extending annular flange 16and fitted to a circular openmg in the bottom of the head 11, so thatmay be adjusted circularly'a'bout the casing 2 to meet variousrequirements in applying the carburetor to engines of various types.

, when the nuts 14 are loosened, the pipe 12 The oil in passing from thechamber 9 to into the mixing chamber. The passageway 21 is adapted to beclosed or partially closed and entirely opened by a valve head 22,comprising a tubular body, closed at its upper end and surrounding andslidably fitted to the upper end of the pipe .18. The valve head 22 isforced normally upward to open the passageway 21 by a spring 23 inclosedby the head 22 and acting against the upper clo ing the top of the pipe18. This valve head 22 is adapted to be depressed against the action ofthe spring 23 and raised by the spring to close or partially close andopen a the passageway 21 by means of devices and for a purpose whichwill be hereinafter'explained.

The valve for controlling the flow of air through the carburetorcomprises a cylindrical body 24 arranged within the casing 2 and fittedto. turn on a horizontal axis and having a passageway 25 extendingtherethrough transversely to its turning axis. The passageway 25 forms aspart of the car bureting chamber inclosed by the casing 2, and thepassageway 25 is substantially the same in diameter as the verticallyextending inlet opening 4 and outlet opening 6 of the carburetingchamber, so that the valve 24 may be turned to the full open position,shown in Fig. 1, to bring the passageway 25 into registry with theopenings 4 and 6,

to permit a large volume of air to be drawn through thecarburetingchamber and so that the valve 25 may be turned to theposition shown in Fig. 2 or to any position intermediate the positionsshown in Figs. 1 and 2 to reduce the volume of air passing throngs. thecarbureting chamber, and thereby regulate the volume of air inaccordance with the speed of the engine. The valve body 24 is providedwith a stem 26 arranged on its turning axis and extending outwardlythrough the wall of the casing 2. The outer end of the stem has an arm27 secured thereto by means of which the valve 24 may be turned.

TVhen the valve 24 is moved to the posi-- tion shown in Fig. 1,- thevalve head 22 is simultaneously moved to open the passageway 21, andwhen the valve 24 is moved to the position shown in Fig. 2, the valvehead 22 is moved to close the passageway 21, and for this purpose I"provide the following: Extending axially through the valve stem 26 is ashaft 28 the inner end of which is provided with a projection 29extending parallel to and having its axis eccentric to' the axis of theshaft 28. The top of the valve head '22 is forced into constant con tactwith this eccentric projection 29 by the; spring 23, and the projection29 is so ar-. ranged that when the shaft 28and stem 26- cloied endthereof, and the cap or head 19 a screw 31 extending through a slot 32in the arm 30 and screwed into the arm 27, so that the stem 26 and shaft'28 will move as a unit when the arm 27 is operated. The slot 32 isarranged so that the arm 30 and shaft 28 may be adjusted about the axisof the stem 26 by loosening the screw 31 thereby permitting the positionof the projection 29 with respect to the valve 24 to be changed andthereby permitting the timing of the operation of the valve 21 withrespect to the movement of the valve 24 to be nicely regulated. Themovement of the arm 27 and valve 24 in one direction to the position oithe valve shown in Fig. 1 is limited by a stop 33 projecting from thecasing 2 and adapted to engage the arm 27; and the movement of the arm27 and valve 24 in the reverse direction to or near the position shownin Fig. 2 is limited by an adjustable screw 34 screwed into and througha projection 35 on the casing 2. By adjusting the screw 34, the limit ofmovement of the arm 27 and valve 24 in that direction may be nicelyregulated.

The oil chamber 9 is provided with an inlet opening 36 arranged to beclosed by a valve head 37 provided with a stem 38 which extends upwardlythrough the oil portion of the stem 38 is threaded and screwed into andthrough a head 40 carrying a float 41 which surrounds the stem 38. Theoil is supplied to the inlet opening 36 through a pipe 42 which isconnected to a suitable source of oil supply; and a constant head of oilis maintained at the inlet opening 36 from said source of supply. Thelevel of the oil within the chamber 9 and pipe 18 is maintained justbelow the discharge opening or passageway 20 by the automatic action ofthe float 41 in opening the valve 37 when the oil falls below saidlevel, and clos ing the valve 37 when'the oil reaches said level.

The upper portion of the oil supply pipe 18 extends into the passageway24, and a slot 43 is cut in the wall 44 of the valve body 24 to receivethe pipe 18 when the valve 24 is moved to the position shown in Fig. 2,the slot 43 being sufiiciently large to permit air to pass therethroughwhen the parts are in this position. The wall 45 ofthe valve body 24also has a slot or opening 46 cut therein to permit air to pass from thepassageway 2'5 and through the outlet opening 6 when the parts are inthe position shown in'Fig. 2. To vary-the opening provided by the slot43 between the passageway 25 and air inlet pipe 12 I provide a pin 47slidably fitted to an opening in the wall of the casing 2 and held inplace by a set screw 48 and extending into the slot 43 and adjustableinto and from the same.

position shown in Fig. 2, the passageway 21 is nearly closed, oil beingdrawn into the mixing chamber through the passageway-21and the slots oropenings 43 and 46 permitting sufiicient air to be drawn into the enginefor the required mixture for slow speed. The slots or openings 43 and 46may be varied by adjusting the pin 47 and the stop screw 34,respectively, to regulate the explosive mixture to a nicety, inaccordance with the requirements of the engine.

When it, is desired to run the engine at high speed with the load on,the operating arm 27 for the valves 22 and 24 is moved into engagementwith the stop 33, thus moving the valves to the position shown in Fig.1, completely opening the oil inlet passage way 21 and permitting themaximum quan- 'tity of air and oil to be drawn into the engine for therequired mixture at high speed.

By adjusting the valves 22 and 24 to different positions intermediatethe positions shown in Figs. 1 and 2, the engine may be run at differentspeeds and at all times with the mixture required in accordance with thespeed.

The adjustments afforded by the set screws 31, 34 and 48 are veryimportant as they enable me to adjust to a nicety both the quantity ofoil supplied through the opening 21 and air supplied through the valve24 for a perfect mixture when the arm 27 is against the screw 34 and theengine is running idle or Without a load.

\Vhen the valve body 24 is moved to a position in which the oil port 21is embraced by the walls of the slot 43, the area of the oil port andthe area of the air passageway will both be reduced, and when the valvebody 24 is moved to move the walls of the slot 43 away from the port 21,the area of the oil port and the area of the air passageway will both beincreased, thereby automatically bringing the area of the oil port 21and the area of the air passageway into proper relation to each otherfor the idling or high speed of the engine controlled by the carbureter.

I claim: r

1. In a carbureter, a casing inclosing' a carbureting chamber having anoutlet opening and an air inlet opening, a cylindrical.

valve body mounted to turn in an opening in saidcasing and having apassageway extending therethrough transversely to the turning axisthereof and adapted to con trol said outlet opening, said passagewaybeing included in said carbureting chamber,

valve body, an oil supply pipe having anoil discharge port thereinembraced by the walls of said slot in one position of the valve body, avalve head movable to open and close said oil discharge port, and meansoperative tosimultaneously move said valve body and said valve head.

2. In a 'carbureter, a casing inclosing a carbureting chamber having anoutlet opening and an air inlet opening, a cylindrical valve bodymounted to turn in an opening in said casing and having a passagewayextending therethrough transversely to the turning axis thereof andadapted to control said outlet opening, said passageway being includedin said carbureting chamber, said valve body having a slot thereinnarrower than said passageway and arranged to control the quantity ofair passing to the carbureting chamber in one position of the valvebody, an oil supply pipe having an oil discharge port therein embracedby the walls of said slot in one position of the valve body,a valve headmovable to open and close sai'd oil discharge port, and

means operative to simultaneously move said valve body' and said valvehead, said means including adjustable devices to vary the relativepositions of said valve body and said valve head. 7 V

3. Ina carbureter, a casing inclosing a carbureting chamber having anoutlet opening and an air inlet opening, a cylindrical tion of the valvebody, an oil supply pipe having an oil discharge port therein embracedby the walls of said slot in one position of the valve body, a valvehead movable to open and close said oil discharge I port, meansoperative to simultaneously move said valve body and said valve head,

and an air obstructing member adjustable within said slot. 7 v Intestimony whereof I aifix my -s1'gna-- ture in presence oftwo witnesses.

JOSEPH WALTER PARKIN. \Vitnessesz. 4

-S. I. HARPER,

A. V. GROUPE.

